A/T Does Not Shift: D3 -> D4

A/T Does Not Shift: D3 -> D4

SYMPTOM: The vehicle does not shift-up from the D3 to D4 gear at the specified speed.

DIAGNOSTIC PROCEDURE

1. CONFIRM THE SYMPTOM
Check if vehicle creeps forward in "D" position and vehicle can be started from D1.
OK or NG
OK >> GO TO 2.
NG >> Refer to AT-199, "Vehicle Does Not Creep Forward in "D" Position", AT-201, "Vehicle Cannot Be Started From D1".
Vehicle Does Not Creep Forward In D Position
Vehicle Cannot Be Started From D1

2. CHECK SELF-DIAGNOSTIC RESULTS
Perform self-diagnosis. Refer to AT-92, "SELF-DIAGNOSTIC RESULT MODE", AT-102, "TCM SELF-DIAGNOSTIC PROCEDURE (NO TOOLS)".
Self-Diagnostic Result Mode
TCM Self-Diagnostic Procedure (No Tools)
Is any malfunction detected by self-diagnostic results?
YES >> Check the malfunctioning system. Refer to AT-92, "SELF-DIAGNOSTIC RESULT MODE", AT-103, "Judgement Self-diagnosis Code".
Self-Diagnostic Result Mode
TCM Self-Diagnostic Procedure (No Tools)
NO >> GO TO 3.

3. CHECK A/T FLUID LEVEL





Check A/T fluid level.
OK or NG
OK >> GO TO 4.
NG >> Refill [1][2]ATF.

4. CHECK LINE PRESSURE





Check line pressure at the engine stall point. Refer to AT-54, "LINE PRESSURE TEST". Line Pressure Test
OK or NG
OK >> GO TO 7.
NG-1 >> Line pressure high: GO TO 5.
NG-2 >> Line pressure low: GO TO 6.

5. DETECT MALFUNCTIONING ITEM
1. Check control valve with TCM.
2. Disassemble A/T.
3. Check the following.
- Oil pump assembly.
OK or NG
OK >> GO TO 7.
NG >> Repair or replace damaged parts.

6. DETECT MALFUNCTIONING ITEM
1. Check control valve with TCM.
2. Disassemble A/T.
3. Check the following.
- Oil pump assembly.
- Power train system.
- Transmission case.
OK or NG
OK >> GO TO 7.
NG >> Repair or replace damaged parts.

7. CHECK A/T FLUID CONDITION
1. Remove oil pan.





2. Check A/T fluid condition. Refer to AT-53, "A/T Fluid Condition Check". A/T Fluid Condition Check
OK or NG
OK >> GO TO 8.
NG >> GO TO 11.

8. DETECT MALFUNCTIONING ITEM
Check the malfunction items. If any items are damaged, repair or replace damaged parts. Refer to AT-64, "Symptom Chart" (Symptom No.12). Symptom Chart
OK or NG
OK >> GO TO 9.
NG >> Repair or replace damaged parts.

9. CHECK SYMPTOM
Check again. Refer to AT-58, "Cruise Test - Part 1", AT-60, "Cruise Test - Part 2".
Cruise Test - Part 1
Cruise Test - Part 2
OK or NG
OK >> INSPECTION END
NG >> GO TO 10.

10. CHECK TCM
1. Check TCM input/output signals. Refer to AT-89, "TCM Input/Output Signal Reference Values". Pinout Values and Diagnostic Parameters
2. If NG, recheck A/T assembly harness connector terminals for damage or loose connection with harness connector.
OK or NG
OK >> INSPECTION END
NG >> Repair or replace damaged parts.

11. DETECT MALFUNCTIONING ITEM
Check the malfunction items. If any items are damaged, repair or replace damaged parts. Refer to AT-64, "Symptom Chart" (Symptom No.12). Symptom Chart
OK or NG
OK >> GO TO 9.
NG >> Repair or replace damaged parts.